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Characterization of Lactobacillus reuteri WQ-Y1 with the ciprofloxacin degradation ability

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Abstract

Object

As a broad-spectrum fluoroquinolone antibiotic drug, ciprofloxacin (CIP) is frequently used in the treatment of a wide variety of infections. However, the residues of this antibiotic pose a big threat to the aquatic environment and human health. In this research, Lactobacillus reuteri WQ-Y1 with CIP degradation ability was screened and identified.

Results

L. reuteri WQ-Y1 with a degradation rate of 65.1% for 4 µg mL−1 CIP was screened from 17 lactic acid bacteria (LAB), and cytochrome P450 enzyme was confirmed to promote the degradation of CIP by L. reuteri WQ-Y1. Meanwhile, the CIP degradation rate were also higher in 48 h’ culture time when co-cultured with 1 mg/mL of glucose in the culture media. Furthermore, result also proved that fluoroquinolone antibiotics with the similar piperazine ring structures could be degraded by L. reuteri WQ-Y1.

Conclusions

L. reuteri WQ-Y1 could degrade fluoroquinolone antibiotics with the similar piperazine ring structure. However, future work still needs to be done on the confirmation of the key enzymes in the cytochrome P450 enzymes family in the biodegradation.

Graphic Abstract

The isolated ciprofloxacin-degrading strain L. reuteri WQ-Y1 had a CIP degradation rate of 65.1% at 24 hours, and one biodegradation metabolite was identified and proved to be an important metabolite of CIP from cytochrome P450 enzymes family hydrolysis with UPLC-MS/MS spectrograms approach.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (32072192, 31671869, 31901668), Key Research and Development Project of Zhejiang Province (2020C02042), the Natural Science Foundation of Zhejiang Province (LY19C200005), the Open Project Program of State Key Laboratory of Dairy Biotechnology (No. SKLDB2020-007) and the K. C. Wong Magna Fund in Ningbo University.

Supplementary information

SupplementaryFigure S1—The degradation rate of CIP by 17 strains of LAB with different MIC at 48 h.

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Authors

Contributions

CXQ performed the ciprofloxacin-degrading strains screening in this study, ZW and DDP contributed to the conception of the study, ZDC performed the cytochrome P450 enzymes activity analysis, XTL helped perform the analysis with constructive discussions, CXQ was a major contributor in writing the manuscript. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Zhen Wu or Daodong Pan.

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The authors declare that they have no competing interests.

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Qu, C., Wu, Z., Pan, D. et al. Characterization of Lactobacillus reuteri WQ-Y1 with the ciprofloxacin degradation ability. Biotechnol Lett 43, 855–864 (2021). https://doi.org/10.1007/s10529-020-03068-9

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  • DOI: https://doi.org/10.1007/s10529-020-03068-9

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